Wrench



A. KURKA.

WRENCH.

APPLICATION FlLED MAR. B. 1921.-

5* k m K H m Patented Jan. 3, 192 2.

UNETE STATES rear OFFER.

ANTON KUBKA, OF PHILLIPS, WISCONSIN.

-WRENCH.. V i 7 Specification-of Letters Patent. :Patgnted Jan, 3,1922;

' Application filed March 8, 1921'. Serial No. 450,576.

To all whom it may concern:

Be it known that I, ANTON KURKA, a citizen of CZecho-Slovakia, and resident of Phillips, in the county of Price and State of Wisconsin, have invented certain new and useful Improvements in Wrenches; and I movement of the handle.

With the above and other objects in view,

the invention consists in certain peculiarities of constructlon and combinatlon of parts, as are hereinafter set forth with reference to the accompanying drawing and subsequently claimed.

The drawing illustrates a side elevation of a wrench embodying the features of my invention, with parts broken away and in section, to more clearly illustrate details of construction.

Referring by character to the drawing, 1 represents a housing formed with a transversely disposed aperture 2 therein,- and terminating at its upperend with a fixed jawh member 3. The housing aperture is intersected by a longitudinally disposed bore 4, into which bore is loosely mounted the spindle 5, having attached to its upper end a worm 6, which worm isv revolubly seated within the housing aperture.

The lower end ,of the spindle has rigidly secured thereto, a handle of standard type 5, whereby the wrench is operated and the spindle is revolved under certain conditions.

The housing is also provided with an offset longitudinally disposed shell 7 which shell is adapted to receive the shank 8 of the sliding jaw 8. The lower end of the jaw shank is provided with a slot 9, whereby the shank is anchored, there being an anchor pin 10 for the shank, which extends.

transversely through the shell walls and shank slot 9. The front edge of the jaw shank is provided with a series of teeth 11,

which teeth are adapted to meshingly engage the teeth of the worm 6 when the jaw is in its normal frictioning position. v

The teeth are held in mesh by a leaf spring 12, which is'secured to the rear wall of the shell 7, and is adapted to impinge against the rear edge of the jaw shank.

From the foregoing description it will be seen, that when it is desired to approxi mately fit the wrench jaws to a nut or the like, the slidable jaw 8 is pulled backwardly, by hand, to the position indicated in dotted lines, which movement is opposed by the spring This movement backwardly of the slidable jaw, is, effected about an are described from the center of the anchor pin 10, and due to the rocking movementit is obvious that the teeth 11 will be disengaged from the worm 6. Hence the operator can spread the jaws apart, or contract them, by sliding the shank 8 up or down so as to bring the lower gripping face" of the slidable jaw 8 to a position with relation to its companion jaw, whereby the nut can be gripped after the adjustment has been-effected. I

If it is desired to firmly bite the nut between the jaws, the operator simply twists the handle 5 slightly, whereby rotation of the worm is effected. which, is in mesh with the teeth 11, and thus the sliding jaw will be positively drawn snugly against the machineelement to which the wrench is applied. Obviously the jaws will belocked,

due to the worm gear connection of the parts, and the nut can readily beturned. To loosen the grip of the nut, the operator may simply revolve the shank 5'in the proper direction. t

While I have shown and described jaws having parallel faces for gripping the nut or other machine element, obviously the de vice is capable of being used as a pipe. wrench, in which the gripping faces of the jaws maybe corrugated orsaid gripping jaw facesmay be varied tosuit other conditionsto which the tool may be applied.

While I have shown and described one specific means for carrying out my invention, it is understood that I may vary the structural features within the scope of the claim. i e

Iclaim: V a

A quick adjustable wrench comprising a with a lower jaw and having an offset lonshank slot, whereby said shank can be ad- 10 justed up or down, or back and forth, and a spring carried by the shell for pressing the toothed edge of the jaw shank into meshed engagement With the WOI'IIL' In testimony that I-claim the foregoing I 15' have hereunto set my hand at Phillips, in

"the county of Price and State of Wisconsin.

7 ANTON KURKA. 

